Keyphrases
- interchange format
- xml documents
- data centric
- databases
- service providers
- data model
- xml data
- expressive power
- web services
- learning environment
- learning process
- content management
- open standards
- service discovery
- markup language
- xml files
- information services
- service oriented
- xml query languages
- language independent
- web service technology
- tutoring system
- student learning
- object oriented
- relational databases
- building blocks
- semantic web
- xml schema
- semi structured
- ubiquitous computing
- information retrieval
- cross lingual
- metadata
- xml databases
- xml format
- context aware
- semantic web languages
- database
- end users
- intelligent tutor
- semi structured data
- xml retrieval
- data integration
- structured data
- intelligent tutoring systems
- online course
- object oriented databases